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June 21st, 2026 :: 3:38 pm CDT   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated June 21st at 2:48 pm 
heavy rain mist
Temperature:68°F Dew Point:64°F
Barometer:29.77 inHg Wind:N 28 Mph
Humidity:88.3% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jun 21st
Monday
Jun 22nd
Tuesday
Jun 23rd
Wednesday
Jun 24th
Thursday
Jun 25th
Rain Mix of Sun and Cloud Mostly Sunny Mostly Sunny Mostly Sunny
71°F
69°F
58°F
77°F
54°F
76°F
59°F
77°F
64°F
 
 Decatur Detailed Weather Forecast  
 
Sunday, June 21st, 2026
Afternoon Temperature: 65°F
Cloudy with rain. Windy at times.
Evening Temperature: 66°F
A mix of cloudy and clear skies with showers. Slight chance of a thunderstorm. Windy.
Monday, June 22nd, 2026
Overnight Temperature: 58°F
A mix of cloudy and clear skies with a chance of showers. Windy at times.
Morning Temperature: 61°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 68°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 64°F
Clear. Windy at times.
Tuesday, June 23rd, 2026
Overnight Temperature: 55°F
Clear.
Morning Temperature: 62°F
Sunny.
Afternoon Temperature: 75°F
Sunny.
Evening Temperature: 68°F
Clear with cloudy periods.
Wednesday, June 24th, 2026
Overnight Temperature: 60°F
Clear.
Morning Temperature: 65°F
Sunny with cloudy periods.
Afternoon Temperature: 75°F
Mostly sunny with a chance of showers or thundershowers.
Evening Temperature: 70°F
Mostly clear with a chance of showers or thundershowers.
Thursday, June 25th, 2026
Overnight Temperature: 65°F
Mostly clear with a chance of showers.
Morning Temperature: 71°F
Sunny with cloudy periods. Slight chance of a thunderstorm.
Afternoon Temperature: 76°F
Mostly sunny. Slight chance of a thunderstorm.
Evening Temperature: 68°F
Clear.
Friday, June 26th, 2026
Overnight Temperature: 60°F
Mostly clear.
Morning Temperature: 67°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 74°F
Cloudy with showers. Chance of a thunderstorm. Windy at times.
Evening Temperature: 69°F
Mostly cloudy with showers. Windy.
Saturday, June 27th, 2026
Overnight Temperature: 69°F
A mix of cloudy and clear skies with a slight chance of showers or thundershowers.
Morning Temperature: 71°F
A mix of cloud and sun with a slight chance of showers or thundershowers.
Afternoon Temperature: 74°F
A mix of cloud and sun. Slight chance of a thunderstorm.
Evening Temperature: 69°F
Clear with cloudy periods.
Sunday, June 28th, 2026
Overnight Temperature: 64°F
Mostly clear with a slight chance of showers.
Morning Temperature: 70°F
Sunny with cloudy periods with a chance of showers.
Afternoon Temperature: 83°F
A mix of sun and cloud. Chance of a thunderstorm.
Evening Temperature: 78°F
Mostly clear. Chance of a thunderstorm. Windy at times.
Monday, June 29th, 2026
Overnight Temperature: 73°F
Mostly clear. Chance of a thunderstorm. Windy at times.
Morning Temperature: 78°F
Mostly sunny. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 87°F
Sunny with cloudy periods with showers likely. Chance of a thunderstorm. Windy at times.
Evening Temperature: 79°F
A mix of cloudy and clear skies with showers likely. Chance of a thunderstorm.





 

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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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